The Thule Allax dog crate is the perfect choice for safe and comfortable car rides with your four-legged friend. It is thoroughly crash tested in our own Thule Test Center, as well as certified by TUV SUD. The innovative crumple zone provides superior protection for both passengers and your dog. The gas dampened door opens and closes softly, and the crate has a built-in lock for added security. FEATURES: Crash-tested from the front, rear, and in a simulated roll-over scenario Innovative crumple zone that absorbs impact during a rear collision Available in multiple sizes with adjustable depth for a perfect fit Soft, gas-damped door for gentle opening and closing Designed for safe and comfortable car rides SIZING: XS: For dogs with wither heights up to 13.8 inches S: For dogs with wither heights up to 17.7 inches M: For dogs with wither heights up to 20.1 inches L: For dogs with wither heights up to 21.7 inches XL: For dogs with wither heights up to 22.8 inches